Global Patent Index - EP 3650706 A1

EP 3650706 A1 20200513 - COMPRESSOR STAGE WITH BLEED AIR TUBES

Title (en)

COMPRESSOR STAGE WITH BLEED AIR TUBES

Title (de)

VERDICHTERSTUFE MIT LUFTENTNAHMEROHREN

Title (fr)

ÉTAGE DE COMPRESSEUR AVEC TUBES DE PRÉLÈVEMENT D'AIR

Publication

EP 3650706 A1 20200513 (EN)

Application

EP 19201705 A 20191007

Priority

GB 201818269 A 20181109

Abstract (en)

A compressor stage comprising a pair of bladed discs spaced apart from one another having a plurality of bleed tubes located in the space between the bladed discs. Each bleed tube has an internal and an external surface extending radially from an inter-disc cavity at the radially innermost section of the tube to a rim of the bladed discs at radially outermost section of the tube. The bleed tubes are positioned between the bladed discs, such that the bleed tubes remove a portion of air passing through the compressor stage and direct it to an area within the inter-disc spacing. The geometric shape of the internal bore of each of the bleed tubes changes along its lengths. The cross-section of each of the bleed tubes may have a cross sectional area that changes from a substantially non-polygonal shape at the radially outermost end to a substantially polygonal shape at the radially innermost end.

IPC 8 full level

F04D 29/32 (2006.01); F01D 5/08 (2006.01); F04D 29/58 (2006.01); F04D 29/64 (2006.01)

CPC (source: EP US)

F01D 5/085 (2013.01 - EP); F01D 5/34 (2013.01 - EP); F02C 6/08 (2013.01 - US); F04D 29/321 (2013.01 - EP US); F04D 29/582 (2013.01 - EP); F04D 29/644 (2013.01 - EP); F01D 5/081 (2013.01 - EP); F04D 19/02 (2013.01 - US); F05D 2220/3216 (2013.01 - EP); F05D 2250/70 (2013.01 - EP)

Citation (search report)

Designated contracting state (EPC)

AL AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HR HU IE IS IT LI LT LU LV MC MK MT NL NO PL PT RO RS SE SI SK SM TR

DOCDB simple family (publication)

EP 3650706 A1 20200513; GB 201818269 D0 20181226; US 2020149470 A1 20200514

DOCDB simple family (application)

EP 19201705 A 20191007; GB 201818269 A 20181109; US 201916672592 A 20191104